Originally posted by ksrcracing
Has anyone tried to use Impact centax clutch with Impact 2 speed (15/49, 18/46) and Impact rear solid axle on Impulse Pro or 705?
ksrcracing, the Impact centax clutch is what we use on our Impulse if we wanted to use a Centax. On the Impulse, the only difference is that instead of the 36 mm flywheel, we have to use the 38 mm flywheel which is used on the Vector / Veteq !
The Centax II clutch on the 705 uses a 35 mm flywheel. In order to use the older Centax I clutch on a 705, I reckon that you just have to switch to the smaller flywheel (35mm) in order to avoid the flywheel scrapping on the tarmac.
The difference between the 2 speed from the Impulse Streetspec / Impulse PRO and the 2 speed from the Impact (which is the same as the Vector / Veteq) is the harder 2 speed clutch shoe springs (6626) versus the softer one found on the Impulse (801412). Also, the Impulse Streetspec / Impulse PRO uses the 801420 50T 1st gear spur instead of the 49T (9649) 1st gear spur from the Impact. The 2nd speed spur from Impulse Streetspec / Impulse PRO is only available at 47T (801417) whereas the ones from the Impact are 46T, 45T and 44T. If you use the Centax, you need to use spurs meant for the Centax to mesh properly. You can still use the 50T spur from the Impulse Streetspec / Impulse PRO but you may need to tilt the engine slightly to give it metter mesh. Also, the spurs will not line up correctly with the Centax pinions. The 705 and all the newer LC lightened 2 speed gearbox includes this heavier 6626 spring.
If you want to use the older Impact gearbox on the 705, you need to change the 2 speed main shaft and use the one from Impact as the holes will line up correctly. You need to use the older Centax I clutch in order to line the older 2 speed spurs properly. In any case, why do you want to change from new technology to old technology?
As for the Impact solid axle, you can use it direclty on the 705 without having the need to change the dogbones as they are already having the same dogbone size as the Impact / 835. If you want to use the Impact solid axle on the Impulse, you need to change the dogbones to the ones from Impact / 835 (808325) or you can even use the ones from the 705 (801323) which are a little softer as the Impact / 835 ones are made from Hudy spring steel.
Yes, most of the parts on 705 are already taken from the Impact. The 705 and the 835 shares many common parts and they are interchangeable.
Based on the link you gave, the pulleys on the Impact, the 835 and the 705 are all the same. Just make sure you when you change the internal pulleys, the ratio is correct.
I believe the only difference in the pulley mounting style is on the 18T rear side pulley of the Impact / 835. They use the MK2 aluminum pulley adaptor 9619 instead of normal 808265 aluminum pulleys adapters that is used to mount all pulleys on the 705.
Hope that helps and if you have any more questions, please fell free to shoot.